Two novel three-dimensional lanthanum coordination polymers have been prepared with the phosphonic acid H2O3PCH2N(C2H4)(2)NCH2PO3H2 (LH4). La-2(LH2)(2)(LH4)Cl-2 (I) and La-2(LH2)(2)(LH3)Cl-2 (II) arise from similar hydrothermal reactions but differing sources of La. A one-dimensional lanthanum-phosphate chain, comprising corner-linked LaO7 and PO3C polyhedra, forms the basis for the two different structures. The two structures differ in the mode of connectivity of the inorganic chains via the phosphonate groups. Both materials include extraframework chloride ions, the different amounts of which apparently direct the polytypic structures. In II, the chloride ions are incorporated in a noncentrosymmetric manner leading to a polar framework topology.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据